Amino acids in the Yamato carbonaceous chrondrite from Antarctica
Evidence for the presence of amino acids of extraterrestrial origin in the Antarctic Yamato carbonaceous chrondrite is presented. Hydrolyzed and nonhydrolyzed water-extracted amino acid samples from exterior, middle and interior portions of the meteorite were analyzed by an amino acid analyzer and b...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19800029378 2023-05-15T13:54:25+02:00 Amino acids in the Yamato carbonaceous chrondrite from Antarctica Shimoyama, A. Ponnamperuma, C. Yanai, K. Unclassified, Unlimited, Publicly available Nov 22, 1979 http://ntrs.nasa.gov/search.jsp?R=19800029378 unknown http://ntrs.nasa.gov/search.jsp?R=19800029378 Accession ID: 80A13548 Copyright Other Sources 55 Nature; 282; Nov. 22 1979 ftnasantrs 2012-02-15T14:16:11Z Evidence for the presence of amino acids of extraterrestrial origin in the Antarctic Yamato carbonaceous chrondrite is presented. Hydrolyzed and nonhydrolyzed water-extracted amino acid samples from exterior, middle and interior portions of the meteorite were analyzed by an amino acid analyzer and by gas chromatography of N-TFA-isopropyl amino acid derivatives. Nine protein and six nonprotein amino acids were detected in the meteorite at abundances between 34 and less than one nmole/g, with equal amounts in interior and exterior portions. Nearly equal abundances of the D and L enantiomers of alanine, aspartic acid and glutamic acid were found, indicating the abiotic, therefore extraterrestrial, origin of the amino acids. The Antarctic environment and the uniformity of protein amino acid abundances are discussed as evidence against the racemization of terrestrially acquired amino acids, and similarities between Yamato amino acid compositions and the amino acid compositions of the Murchison and Murray type II carbonaceous chrondrites are indicated. Other/Unknown Material Antarc* Antarctic Antarctica NASA Technical Reports Server (NTRS) Antarctic The Antarctic Yamato ENVELOPE(35.583,35.583,-71.417,-71.417) Murchison ENVELOPE(144.250,144.250,-67.317,-67.317) |
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NASA Technical Reports Server (NTRS) |
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55 Shimoyama, A. Ponnamperuma, C. Yanai, K. Amino acids in the Yamato carbonaceous chrondrite from Antarctica |
topic_facet |
55 |
description |
Evidence for the presence of amino acids of extraterrestrial origin in the Antarctic Yamato carbonaceous chrondrite is presented. Hydrolyzed and nonhydrolyzed water-extracted amino acid samples from exterior, middle and interior portions of the meteorite were analyzed by an amino acid analyzer and by gas chromatography of N-TFA-isopropyl amino acid derivatives. Nine protein and six nonprotein amino acids were detected in the meteorite at abundances between 34 and less than one nmole/g, with equal amounts in interior and exterior portions. Nearly equal abundances of the D and L enantiomers of alanine, aspartic acid and glutamic acid were found, indicating the abiotic, therefore extraterrestrial, origin of the amino acids. The Antarctic environment and the uniformity of protein amino acid abundances are discussed as evidence against the racemization of terrestrially acquired amino acids, and similarities between Yamato amino acid compositions and the amino acid compositions of the Murchison and Murray type II carbonaceous chrondrites are indicated. |
format |
Other/Unknown Material |
author |
Shimoyama, A. Ponnamperuma, C. Yanai, K. |
author_facet |
Shimoyama, A. Ponnamperuma, C. Yanai, K. |
author_sort |
Shimoyama, A. |
title |
Amino acids in the Yamato carbonaceous chrondrite from Antarctica |
title_short |
Amino acids in the Yamato carbonaceous chrondrite from Antarctica |
title_full |
Amino acids in the Yamato carbonaceous chrondrite from Antarctica |
title_fullStr |
Amino acids in the Yamato carbonaceous chrondrite from Antarctica |
title_full_unstemmed |
Amino acids in the Yamato carbonaceous chrondrite from Antarctica |
title_sort |
amino acids in the yamato carbonaceous chrondrite from antarctica |
publishDate |
1979 |
url |
http://ntrs.nasa.gov/search.jsp?R=19800029378 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(35.583,35.583,-71.417,-71.417) ENVELOPE(144.250,144.250,-67.317,-67.317) |
geographic |
Antarctic The Antarctic Yamato Murchison |
geographic_facet |
Antarctic The Antarctic Yamato Murchison |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19800029378 Accession ID: 80A13548 |
op_rights |
Copyright |
_version_ |
1766260207624650752 |